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Finding the Fourth Proportional to 694.03, 957.78 and 399.29

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Solution

The fourth proportional to 694.03, 957.78 and 399.29 is: 551.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    694.03 : 957.78 = 399.29 : x
  2. Step 2: Convert to fraction form
    694.03/957.78 = 399.29/x
  3. Step 3: Cross multiply
    694.03x = 957.78 × 399.29
  4. Step 4: Simplify right side
    694.03x = 382,435.37
  5. Step 5: Solve for x
    x = 382,435.37/694.03
  6. Step 6: Final answer
    x = 551.04

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.